9. shot (n.) a consecutive series of pictures that constitutes a unit of action in a film
The vacuum level is determined by the pressure differential between the evacuated volume and the surrounding atmosphere. Several units of measure can be used. Most refer to the height of a column of mercury â usually inches of mercury (in.-Hg) or millimeters of mercury (mm-Hg).
Measurement of the suction draw of a vacuum (or carburetor vacuum lines) is done with a negative atmospheric pressure Manometer. Positive pressure manometers are used for pipe organ chest, windtrunk and reservoir readings.